So far we know that in Q3 Redmile sold their 1,077,465 share position, while TFS CAPITAL LLC became a new holder, buying 97,688 shares. It's a bit harder to keep up with Tang's machinations, but like you say, we should have a clearer picture by the end of next week.
Premarket looking pretty good today, but only 2,499 shares traded so far.
Just saw Tang Capital's filing, and it looks like they sold their 73,895 CYCC shares. Baker Bros still holds 20,979 shares of CYCCP, Allianz has 559,207 CYCC shares, Perceptive looks like they sold out, Geode has 71,189 shares , DAFNA sold, Catalyst went up to 148,000 shares, Barclays has 78,324 AND a 475,000 share put position.
That doesn't rule out acquisitions by new funds - I only checked previous holders.